diff --git a/CHANGELOG.md b/CHANGELOG.md
index 10338f6646053..a4d42116fa9af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -83,6 +83,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Don't over-allocate in HeapBufferedAsyncEntityConsumer in order to consume the response ([#9993](https://github.com/opensearch-project/OpenSearch/pull/9993))
 - Update supported version for max_shard_size parameter in Shrink API ([#11439](https://github.com/opensearch-project/OpenSearch/pull/11439))
 - Fix typo in API annotation check message ([11836](https://github.com/opensearch-project/OpenSearch/pull/11836))
+- Update supported version for must_exist parameter in update aliases API ([#11872](https://github.com/opensearch-project/OpenSearch/pull/11872))
 
 ### Security
 
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml
index dbf6a4fad3295..b9457f0290897 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml
+++ b/rest-api-spec/src/main/resources/rest-api-spec/test/indices.update_aliases/40_remove_with_must_exist.yml
@@ -1,8 +1,8 @@
 ---
 "Throw aliases missing exception when removing non-existing alias with setting must_exist to true":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0"
+      version: " - 2.11.99"
+      reason: "introduced in 2.12.0"
 
   - do:
       indices.create:
@@ -47,8 +47,8 @@
 ---
 "Throw aliases missing exception when all of the specified aliases are non-existing":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0"
+      version: " - 2.11.99"
+      reason: "introduced in 2.12.0"
 
   - do:
       indices.create:
@@ -81,8 +81,8 @@
 ---
 "Remove successfully when some specified aliases are non-existing":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0"
+      version: " - 2.11.99"
+      reason: "introduced in 2.12.0"
 
   - do:
       indices.create:
@@ -116,8 +116,8 @@
 ---
 "Remove silently when all of the specified aliases are non-existing and must_exist is false":
   - skip:
-      version: " - 2.99.99"
-      reason: "introduced in 3.0"
+      version: " - 2.11.99"
+      reason: "introduced in 2.12.0"
 
   - do:
       indices.create: